Improvement in chilled plates for ore-crushers



To all lwhom tt mgl/y concertar, I

Y e tinit 5mm.

Maca-m @met fire.

JOHN L.AGNEW AND CHARLES E. WRIGHT, for rNeem-INEE;v

MICHIGAN.

Letters Patent No. 87,750, dated Mtv/rch, 16, 1869; m'ttedated February 27, 1869.

IMPBQVEMENT IN CHILLED i=LATE` Fon omi-mwsxznlas.

The Schedule referred to in these 'Letten Patent and making part of the sama.

Be it known that we, JOHN L. AGNEW and CHARLES E. WRIqwls'r, of Negannee, in the county of Marquette, 1 and State of Michigan, h ave invented new anduseful Improvements on the Chilled Plates and Surfaces between'which Minerals are Crushed, Broken, or Ground; and Wedo' hereby declare that the following is a full and exact description thereof, reference being had Ito .the accompanying drawings, making a part of this specification, in whichv l Figure 2 is a plan of the chilled' plates-used by the Blake crnsher, containing our improvements. l

Figurel .is avertical section of the same through.l

V By reference to the figs. l and 2, let O U represent itshe bars of soft iron, cast in the chilled plates or suraces.

S S are the points of contact with the minerals. l i While the'points-or ribs S S are Wearing away,the soft-metal bars C O wear also,` and, in consequence thereof', the points or ribs S Sremain constantly sharp I purpose set forth.

or prominent, until 'thel bars O C arecompletely worn away.

Fig. l represents, by a vertical section, the ribs, or

points S S cast on eachside ofthe chilled plate. The

reason for this is,that when the points, or ribs S S are Worn olf-on the working-face, it may then be reversed, bringing the nninjured face or side to the front, and thereby causing the chilled plates to last nearlyitwice as long. A

The action of crushing or grinding minerals tends to destroy the ribbed or uneven surface, by making it smooth, thereby impairin g the eiiiciency'of the machine.

' What we claim as our invention, and desire to secure by Letters Patent, is-.

l The plate for ore-crushers, constructed of wrought and chilled iron, in the manner described and for the JOHN L. AGNEW. Witnesses: CHARLES E. WRIGHT.

G. H. HoPKms,

WM HOPKINS., 

